LR7533-M from LR, in a SOT-89-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VSS	power_in	Ground / common return for the regulator. All voltages are referenced to this pin. Also labeled GND in the block diagram.
2	VIN	power_in	Unregulated supply input. Accepts up to 24V continuously (32V abs max). A bypass capacitor should be connected between VIN and VSS, especially for high-impedance sources such as batteries.
3	VOUT	power_out	Regulated 3.3V output (±2%, VOUT×0.98 to VOUT×1.02). Delivers up to 100mA. Requires a 1-10uF output capacitor to VSS for stability and transient response. Internally short-circuit protected (Iscp ≈ 20mA, Iocp ≈ 120mA).

Key specifications

Parameter	Value
Manufacturer	LR
Package	SOT-89-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

LR7533-M
LR7533-M-T

CAD (KiCad official)

Symbol: LR7533-M
Footprint: Package_TO_SOT_SMD:SOT-89-3
3D model: SOT-89-3 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lr7533-m.step`	57 KB	You want the bare part, or you mark your own boards.
`lr7533-m-etched.step`	1.1 MB	You want the part with `LR7533-M` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 313 faces against 42 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: LR datasheet (13 pp, sha256 0b58c65ef75e4ef4, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF